Secondly, in an ideal world, you want to keep your audiences broad because your CPM's will be cheaper plus, you are increasing your pool of people you can target if your campaign converts.

If you are testing lots of different audiences to see which ones convert, put the audiences in seperate ad sets, start your budgets on $20 to $30 per day, see which ad sets and ads are working well, when you have found winners, place them all into one ad set and scale.

When scaling, you want your audiences to be in excess of 1 million to 2 million people.

Secondly, in an ideal world, you want to keep your audiences broad because your CPM's will be cheaper plus, you are increasing your pool of people you can target if your campaign converts.

If you are testing lots of different audiences to see which ones convert, put the audiences in seperate ad sets, start your budgets on $20 to $30 per day, see which ad sets and ads are working well, when you have found winners, place them all into one ad set and scale.

When scaling, you want your audiences to be in excess of 1 million to 2 million people.

Grant

perfect, thanks.

Only one thing - how does having a broader audience lower the CPM ?

I thought the better (more specific / narrow) the targeting, the lower the costs..

I'd recommend splitting it up. Audience size doesn't matter that much. Just make sure you separate them into their own adsets & set the appropriate budget. I see great results with a 30k audience and a 2.7 million audience all the time. Don't sweat it.